Retirement Longevity Calculator
Use this retirement longevity calculator to estimate how long your retirement savings may last based on annual withdrawals and expected investment return.
Tip: Try adjusting the return rate or withdrawal amount to see how sensitive your retirement plan may be to changes.
How this retirement longevity calculator works
This retirement longevity calculator estimates how long your savings may last by subtracting your annual withdrawal from your balance each year after applying the expected return rate you enter.
Each year, the remaining balance is grown by the return rate and then reduced by the withdrawal amount. This process repeats until the balance reaches zero or a maximum planning horizon is reached.
The sensitivity check shows how longevity changes if you withdraw slightly more or less, helping you understand how flexible your retirement plan may need to be.
This tool does not include taxes, inflation, investment fees, changing withdrawals, or market volatility. Results are simplified planning estimates, not predictions.
How to use this calculator
Enter your starting retirement savings, planned annual withdrawal, and expected annual return. Then click Calculate to estimate how many years your savings may last under those assumptions.
What your result means
Your result shows an estimated longevity period for your savings, an approximate year your balance may last through, and a sensitivity check showing how a slightly lower or higher withdrawal could affect the timeline.
Example retirement longevity scenario
For example, if you retire with $500,000 in savings, withdraw $40,000 per year, and assume a 5% annual return, this calculator can estimate how long that balance may last under a simplified model.
Frequently asked questions
What is a retirement longevity calculator?
A retirement longevity calculator estimates how long your retirement savings may last based on your portfolio size, annual withdrawals, and assumed investment return.
How accurate is this retirement estimate?
This is a simplified planning estimate. Actual retirement outcomes can vary because of taxes, inflation, market volatility, fees, and changes in withdrawal needs over time.
Does this calculator include inflation?
No. This tool assumes a fixed annual withdrawal amount and does not automatically increase spending for inflation.
What happens if I withdraw more each year?
In general, higher withdrawals reduce how long savings may last. That is why the sensitivity check is useful for comparing different withdrawal levels.
Can I use this calculator for retirement planning?
Yes. This tool can help you explore retirement income scenarios and test assumptions, but it should be used as a general planning estimate rather than personalized financial advice.